The effect of fiber content on the mechanical and thermal expansion properties of biocomposites based on microfibrillated cellulose
The effect of fiber content on the mechanical and thermal expansion properties of biocomposites based on microfibrillated cellulose
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DOI：
10.1007/s10570-008-9212-x
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发表时间：
2008-08-01
期刊：
影响因子：
5.7
通讯作者：
Yano, Hiroyuki
中科院分区：
文献类型：
--
作者：
Nakagaito, Antonio Norio;Yano, Hiroyuki
建立了一种制备宽纤维含量微纤化纤维素增强酚醛树脂复合材料的新方法，并通过拉伸试验对复合材料的力学性能进行了评价。在纤维含量高达40重量%时观察到杨氏模量的线性增加，对于更高的纤维百分比具有稳定趋势。这些结果通过相对于纤维含量的热膨胀系数（CTE）的测量得到证实，这表明低于60重量%纤维含量的强热膨胀限制率，表明纤维素微纤丝获得的有效增强。达到10 ppm/K的低CTE是纤维素复合材料的重要性能之一。
A new method to obtain composites of phenolic resin reinforced with microfibrillated cellulose with a wide fiber content was established and the mechanical properties were evaluated by tensile test. A linear increase in Young's modulus was observed at fiber contents up to 40 wt%, with a stabilizing tendency for higher fiber percentages. These results were ratified by measurements of the coefficient of thermal expansion (CTE) relative to fiber content, which indicated a strong thermal expansion restriction rate below 60 wt% fiber content, indicating the effective reinforcement attained by the cellulose microfibrils. The low CTE achieved of 10 ppm/K is one of the important properties of cellulose composites.